Just so we are on the same page I will explain what a Refrigerators defrost timer does and where the defrost timer is located on a top mount refrigerator freezer. The Defrost timer tells the refrigerator when to go into defrost. The mechanical timer is set to run for 8 hours and then go into a defrost cycle for 30 min, during which time voltage is applied to the refrigerators defrost heater. If you have ever heard a hiss from the freezer side of your refrigerator it is a good chance the refrigerator was in defrost melting the frost on the evaporator and dripping ontoRead More →